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Species · Indiana · BBS 2026 Release · 1966–2025

Yellow-throated Vireo Population Trend in Indiana

All statesForest birds

Yellow-throated Vireo in Indiana has risen sharply: up 71% on the route-weighted index since 1968.

+71%Since 1968TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
61Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
59YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Yellow-throated Vireo Trends in IndianaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Yellow-throated Vireo has risen sharply in Indiana: up 71% on the route-weighted index since 1968.

Yellow-throated Vireo Population Forecast in Indiana

If the recent trend holds, Yellow-throated Vireo in Indiana is projected to stay roughly flat through 2030, near 1.6 (95% range 0.79–2.3). A 5-year backtest shows a typical error of ±23.4%, with 100% of held-out values landing inside the 95% band.

-4%Change by 2030TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
1.6Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.79–2.395% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±23.4%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Yellow-throated Vireo in Indiana is projected to stay roughly flat through 2030, near 1.6 (95% range 0.79–2.3). A 5-year backtest shows a typical error of ±23.4%, with 100% of held-out values landing inside the 95% band.19662030
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20261.50.742.3
20271.50.752.3
20281.50.762.3
20291.50.772.3
20301.60.792.3

Yellow-throated Vireo Survey Routes in Indiana

Routes recording Yellow-throated Vireo in Indiana.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Spencer1020241974
Indian Spgs1020251986
Hoosier920251990
Belmont820241982
Georgia820251999
Cross Plains820251999
Celestine520251979
Clear Spring520251981
Wallace520241999
Knox420251981
Sexton420161987
Vevay320251966
Portage 2320152006
Hebron220101966
Middlebury220251989
Berne220221975
Brazil220241966
Jamestown220251988
Azalia220251982
Washington219911991
Cumback220251966
Millersburg220141982
Corydon220251966
Evansville220121966
Lagrange220252001

Yellow-throated Vireo Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.